<template>
  <div class="upload-container">
    <el-button :style="{background:color,borderColor:color}" icon="el-icon-upload" size="mini" type="primary" @click=" dialogVisible=true">
      上传图片
    </el-button>
    <el-dialog :visible.sync="dialogVisible">
      <el-upload
        :multiple="true"
        :file-list="fileList"
        :show-file-list="true"
        :on-remove="handleRemove"
        :before-upload="beforeUpload"
        :on-change="handleChange"
        :auto-upload="false"
        class="editor-slide-upload"
        action="#"
        list-type="picture-card"
      >
        <el-button size="small" type="primary">
          点击上传
        </el-button>
      </el-upload>
      <el-button @click="dialogVisible = false">
        取消
      </el-button>
      <el-button type="primary" @click="handleSubmit">
        确认
      </el-button>
    </el-dialog>
  </div>
</template>

<script>

// import { getToken } from 'api/qiniu'
import { getInfoFromOss } from '@/api/public'
import { randomString } from '@/utils'
import axios from 'axios'

export default {
  name: 'EditorSlideUpload',
  props: {
    color: {
      type: String,
      default: '#1890ff'
    }
  },
  data() {
    return {
      dialogVisible: false,
      listObj: {},
      fileList: []
    }
  },
  methods: {
    checkAllSuccess() {
      return Object.keys(this.listObj).every(item => this.listObj[item].hasSuccess)
    },
    handleSubmit() {
      const arr = Object.keys(this.listObj).map(v => this.listObj[v])
      if (!this.checkAllSuccess()) {
        this.$message('请等待所有图片上传成功. 如果出现网络问题, 请刷新页面并重新上传!')
        return
      }
      this.$emit('successCBK', arr)
      this.listObj = {}
      this.fileList = []
      this.dialogVisible = false
    },
    handleSuccess(response, file) {
      const uid = file.uid
      const objKeyArr = Object.keys(this.listObj)
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          this.listObj[objKeyArr[i]].url = response.files.file
          this.listObj[objKeyArr[i]].hasSuccess = true
          return
        }
      }
    },
    handleRemove(file) {
      const uid = file.uid
      const objKeyArr = Object.keys(this.listObj)
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          delete this.listObj[objKeyArr[i]]
          return
        }
      }
    },
    handleChange(file, fileList) {
      console.log('handleChange' + fileList.length)
      console.log(file)

      this.beforeUpload(file).then(() => {
        return getInfoFromOss()
      }).then(response => {
        console.log(response)
        const info = response.data

        const randomStr = randomString(13)
        const param = new FormData()
        param.append('key', randomStr)
        param.append('policy', info.policy)
        param.append('OSSAccessKeyId', info.accessKeyId)
        param.append('success_action_status', 200)
        param.append('signature', info.signature)
        param.append('file', file.raw, file.name)
        param.append('chunk', '0')
        const config = {
          headers: {
            'Content-Type': 'multipart/form-data',
            'Access-Control-Allow-Origin': '*'
          }
        }
        axios.post(info.host, param, config)
          .then(response => {
            console.log('图片提交成功')
            console.log(response)
            if (response.status === 200) {
              this.$message({ message: '图片上传成功', type: 'success' })
            } else {
              this.$message({ message: '图片上传失败', type: 'error' })
            }
          }).then(() => {
            const uid = file.uid
            const objKeyArr = Object.keys(this.listObj)
            for (let i = 0, len = objKeyArr.length; i < len; i++) {
              if (this.listObj[objKeyArr[i]].uid === uid) {
                this.listObj[objKeyArr[i]].url = info.host + '/' + randomStr
                this.listObj[objKeyArr[i]].hasSuccess = true
                return
              }
            }
          })
      })
    },
    beforeUpload(file) {
      const _self = this
      // const _URL = window.URL || window.webkitURL
      const fileName = file.uid
      this.listObj[fileName] = {}
      return new Promise((resolve, reject) => {
        // const img = new Image()
        // img.src = _URL.createObjectURL(file)
        _self.listObj[fileName] = { hasSuccess: false, uid: file.uid, width: this.width, height: this.height }
        resolve(true)
      })
    }
  }
}
</script>

<style lang="scss" scoped>
.editor-slide-upload {
  margin-bottom: 20px;
  /deep/ .el-upload--picture-card {
    width: 100%;
  }
}
</style>
